Insulating-covering for cables.



P. TORGHIO.

INSULATING COVEBING POR CABLES.

APPLICATION FILED MAY 4, 1909. 958,046, f Patented May 17, 1910.

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INSULATING COVERING FOR CABLES.

APPLICATION :FILED MAY 4, 1909.

LL n( Patented May 17, 1910.

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UNITED sTATEs PATENT oEEioE PHILIP TORCHIO, OF NEW YORK, N. Y.

INSULATING-COVERING- FOR CABLES.

y, Specication of Letters Patent.

Patented May 17, 1910.

Application inea may 4,1909. serial No. 493,880.

To all whom it lnui/ 1] concern:

Be it 'known that I, PHILIP" Toncmo, a

'- subject of the King of Italy, residing at mag' an New York, in the county of New York and State of 4New York, have invented a certain new and useful Improvement in Insulating-- Coverings for Cables, of which the following is a specification. f

The invention relates\to the manufacture of insulating coverings for electric conductors, and more particularly to the method of making said covering, so that it ultimately becomes a plurality of strips of fabric embodiedl in a homogeneous cylindricalv of a portion of said covering. Figs. 3 and 4 are views respectively similar' to Figs. l

' and 2 indicating the condition of the covering after vulcanization.l Fig. 5 is a side elevation of a machine for saturating the strips of fabric and applying the same to the conductor.

Similar letters of reference indicate like parts. I

In carrying out my process, I may use the apparatus represented in Fig. 5. On the table A are disposed a number of pairs of standards B. In each pair is journaled a hollow shaft carr ing the belt pulley C and having at one .en a head D, upon which is mounted an inclined reel E for the fabric strip F. Upon one member of each pair'of standards is a bracket G which sup orts a tank H having openings in its wa ls. In the tanks H is placed the rubber solution with which the fabric is to be permeated.

yThe conductor I is drawn continuously through the hollow shafts and tanks by means of the rotating friction drum J. At the same time, the reels E are Ven orbital motion around the conductor y means of the belts K which transmit motion to the pulleys C from pulleys L on the main drivlng shaft M. The strips are thus wound on the cable spirally wlth butt joints N at their edges, and in successive layers, as, O, P, Q, R. The strips of one layer `may be Woundjin opposite direction to the strips of the next ad]acent layer, but I consider it preferable to wind two layers, a' O, P,

in one direction and two layers, as, R, in the oppositedirection, and so on alternately. This 1s accomplished inV the apparatus of Fig. 5, by crossing two of the driving belts K, as indicated at a.

The rubber solution used in the tanks is compounded with a suilicient'percentage of sulfur, lit-barge and other ingredients required for the proper vulcanization of the rubber, and as the Wound cable is drawn through the tanks, said solution permeates the fabric strips and cements together the successive layers. The covered cable is ,next

- .vulcanized preferably at a temperature not exceeding 250 Fah., whereby all the moisture in the fabric is expelled and the whole body of rubber on and in the separate strips is converted into a homogeneous mass S,

Figs. 3 and 4, without joints, in which mass the Istrips remain embedded and firmly held. The lines of demarcation between the original layers of fabric and the joints of each' set of strips physically disappear, and an insulating covering is produced which is continuous, homogeneous, elastic and waterroo p In another application ^for Letters Patent, Serial No. 478,762, led by me `April 3, 1909, I have described and claimed the insulating covering being the product of my herein set forth process.

I claim 1. The process of making an insulating covering for electric conductors which consists in first, winding a stri of fabric in close spiral around the con uctor: second, saturating said appliedl strip with a rubber solution: third, winding another strip of fabric in'like manner upon the first strip: fourth, saturating said second applied strip with a rubber solution and so on continuously for any desired l number of layers: fifth, vulcanizing said covered conductor to convert the several layers of rubberl engaging with said several strips into a homogeneous mass.

2. The process of making an insulating covering `for electric'conductors which consists in first, winding a strip of fabric ink drawing said covered' conductor through a the several layers'of rubber engaging with l bath of rubber solution: third, Winding a said several strips into a homogeneous mass. 10

second stripY of fabric in like manner upon din testimony whereof I have axed my the first strip: fourth, drawing said consignature in presence of two Witnesses.

ductor, thus twice covered, through a bath PI-HLU?i TGRCHIO. of rubber solution and so on continuously Witnesses: for any desired number of layers: fth, vul- MAY T. MGGARRY,

canizing said covered lconductor to lconvert GERTRUDE T. PORTER. 

